5 papers
Guangqi: A two-dimensional radiation hydrodynamic code with realistic equation of states
Zhuo Chen, Xue-Ning Bai
We present Guangqi, a new two-dimensional, finite-volume radiation hydrodynamics code designed for high-performance astrophysical simulations. The code simultaneously resolves the…
Cosmic Ray Magnetohydrodynamics: A New Two-Moment Framework with Numerical Implementation
Xihui Zhao, Xue-Ning Bai, Eve C. Ostriker
Cosmic rays (CRs) play a pivotal role in various astrophysical systems, delivering feedback over a broad range of scales. However, modeling CR transport remains challenging due to…
Magnetohydrodynamic-guiding-center-particle-in-cell Method for Multiscale Plasma Kinetic Simulations
Zitao Hu, Xue-Ning Bai, Xiaochen Sun
We present the formulation, algorithm and numerical tests of the magnetohydrodynamic-particle-in-cell (MHD-PIC) method with particles treated under the guiding center approximation…
Kinetic simulations of the cosmic ray pressure anisotropy instability: cosmic ray scattering rate in the saturated state
Xiaochen Sun, Xue-Ning Bai, Xihui Zhao
Cosmic ray (CR) feedback plays a vital role in shaping the formation and evolution of galaxies through their interaction with magnetohydrodynamic waves. In the CR self-confinement…
Linear Analysis and Simulations of the Cosmic-Ray Streaming Instability: the Importance of Oblique Waves
Shuzhe Zeng, Xue-Ning Bai, Xiaochen Sun
Cosmic-ray (CR) streaming instability (CRSI) is believed to play an important role in CR transport and CR feedback to galaxies. It drives the growth of magnetohydrodynamic (MHD) wa…